Fix hold() inflating Part.total_beats and Score.duration_ms — v0.40.8

Note.beats now returns 0.0 for held notes (_hold=True), matching the
renderer which already skipped advancing the beat position. Previously
every hold() call added its full duration to the part's total, causing
duration reports to be 2-3x too long on tracks with drone notes.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

CHANGELOG.md

@@ -2,6 +2,15 @@
 
 All notable changes to PyTheory are documented here.
 
+## 0.40.8
+
+- **Fix hold() inflating duration** — `Note.beats` was returning the full
+  duration for held notes (`_hold=True`), causing `Part.total_beats` and
+  `Score.duration_ms` to overcount. A part with `hold(Sa, WHOLE * 4)` followed
+  by `add(Pa, QUARTER)` would report 17 beats instead of 1. Now held notes
+  return 0 beats, matching the renderer which already skipped advancing the
+  timeline for held notes.
+
 ## 0.40.7
 
 - **Expose missing Synth enum entries** — rhodes, wurlitzer, vibraphone,

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "pytheory"
-version = "0.40.7"
+version = "0.40.8"
 description = "Music Theory for Humans"
 readme = "README.md"
 license = "MIT"

pytheory/rhythm.py

@@ -475,6 +475,8 @@ class Note:
 
     @property
     def beats(self) -> float:
+        if self._hold:
+            return 0.0
         return self.duration.value